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Statements of Comprehensive Income - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Net income | $ 84,242 | $ 86,135 | $ 81,012
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax | (455) | (502) | (424)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax | 9,241 | (109) | 910
Other comprehensive (loss) income, net of income tax: |  |  |
Changes in pension plan assets and benefit obligations recognized in other comprehensive income | (8,786) | 611 | (486)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax | (1,184) | 0 | 0
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Reclassification Adjustments, Net of Tax | 1,261 | (2,713) | (1,549)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax | 77 | (2,713) | (1,549)
Other Comprehensive Income (Loss), Net of Tax | (8,709) | (2,102) | (2,035)
Comprehensive income | $ 75,533 | $ 84,033 | $ 78,977

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